Boar hair is used as bristles for brushes to clean and detangle the hair. The unique structure of the boar hair bristles carries the hair’s natural oils from the scalp to the end of the hair shaft. By coating each strand with a very small amount of sebum, the brush repairs dry hair and adds lustrous shine without using styling products. Sebum works like a natural anti-frizz serum that repairs dry hair and adds lustrous shine.